Fix for SafeArea management on iOS Failing test case - LabelShouldSizeProperlyOnCollectionView#30682
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PureWeen merged 8 commits intodotnet:PureWeen/safe-area-fixes-ios-net10from Jul 17, 2025
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* Fixed the SafeArea test case issues and 22417(mac) main issue * Removed the Fails condition on Mac
…and improve RTL layout handling
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…eProperlyOnCollectionView (#30682) * Fix SafeArea management on iOS * Fixed the SafeArea branch test case failures issues (#30622) * Fixed the SafeArea test case issues and 22417(mac) main issue * Removed the Fails condition on Mac * Enhance CrossPlatformArrange method to support safe area adjustments and improve RTL layout handling * - add images and fix naming * - additional image updates * - add comments * fix update. --------- Co-authored-by: Shane Neuville <shneuvil@microsoft.com> Co-authored-by: Ahamed-Ali <102580874+Ahamed-Ali@users.noreply.github.com>
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…eProperlyOnCollectionView (#30682) * Fix SafeArea management on iOS * Fixed the SafeArea branch test case failures issues (#30622) * Fixed the SafeArea test case issues and 22417(mac) main issue * Removed the Fails condition on Mac * Enhance CrossPlatformArrange method to support safe area adjustments and improve RTL layout handling * - add images and fix naming * - additional image updates * - add comments * fix update. --------- Co-authored-by: Shane Neuville <shneuvil@microsoft.com> Co-authored-by: Ahamed-Ali <102580874+Ahamed-Ali@users.noreply.github.com>
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…eProperlyOnCollectionView (#30682) * Fix SafeArea management on iOS * Fixed the SafeArea branch test case failures issues (#30622) * Fixed the SafeArea test case issues and 22417(mac) main issue * Removed the Fails condition on Mac * Enhance CrossPlatformArrange method to support safe area adjustments and improve RTL layout handling * - add images and fix naming * - additional image updates * - add comments * fix update. --------- Co-authored-by: Shane Neuville <shneuvil@microsoft.com> Co-authored-by: Ahamed-Ali <102580874+Ahamed-Ali@users.noreply.github.com>
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PR - #30629 Failing test case details :
Root Cause
The root cause of the layout freeze on iPhone XS is a microscopic floating-point precision error in
UIKit’s SafeAreaInsetsreporting. Instead of returning a clean zero, iPhone XS provides a non-zero value (3.5527136788005009e-15) for the left inset.This value is treated by the layout system as a legitimate inset change, triggering a layout re-evaluation. Since the value never stabilizes to an exact zero, the system enters an infinite layout loop.
Other iPhone models such as iPhone 11 and iPhone 16 return precise
{0,0,0,0}insets and are not affected.Description of Change
This change applies a strict floating-point threshold (1e-14) to treat such negligible values as zero before passing them into the layout system. The chosen tolerance is precise enough to eliminate false positives without suppressing valid sub-pixel safe area insets on high-resolution displays.
This ensures stable layout behavior across devices while preserving layout precision for real safe area adjustments.
Issues Fixed
Fixes #30629 failing test case - LabelShouldSizeProperlyOnCollectionView
Tested the behaviour in the following platforms
Output Video
BeforeFix.mov
AfterFix.mov